Boiler-head.



N. B. SHEPARD.

BOILER HEAD.

APPLICATION FILED FEB. 24. 1915.

1,205,037. Patented Nov. 14, 1916.

l n i" r r 5 NB. 3/76 am/ moan B. snnranp, or streams nn, Tennessee.

BOILER-HEAD.

eeaosa Specification of Letters Patent.

Patented Nov. 1d, 1916.

Application filed February 24, 1915. Serial N 0. 10,230.

To all whom it may concern Be 1t known that L NOAH B. SHEPARD, a

citizen of the United States, residing at Cypress Inn, in the county oflVayne and State of Tennessee, have invented certain new and usefulImprovements in Boiler-Heads; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled I in the art to which it appertains to make anduse the same.

The invention relates to improvements in boiler heads. 7

The object of the present invention is to provide a simple, practical"and eilicient boiler head of strong and durable construction adapted toobviate the disadvantages and troubles resulting from the burning out ofthe ends of boiler tubes of the ordinary construction and to provide animproved construction in which the water will be permitted to circulateentirely around the ends of the boiler tubes whereby the latter aremaintained su'liiciently cool to prevent them from burning out.

lVith these and other objects in view the invention consists in theconstruction and novel combination and arrangement of parts hereinafterfully described, illustrated in the apcompanying drawings and pointedout in the claims hereto appended, it being understood that variouschanges in the form, proportion and minor details of construction may beresorted to without departing from the spirit or sacrificing any of thead vantages of the invention.

Figure 1 is a horizontal sectional view of one end of a boiler providedwith a boiler head constructed in accordance with this invention, Fig. 2is an elevation of the boiler head viewed from the inner side, and Fig.3 is an enlarged detail sectional view illustrating the construction ofthe grooves into which the ends of the boiler tubes are expanded.

Like numerals of reference designate corresponding parts in all thefigures of the drawing.

In the accompanying drawing in which is illustrated the preferredembodiment of the invention 1 designates an outside boiler head unitedat its periphery to the wall 2 of the body portion of the boiler in theusual manner. This outside boiler head which has openings 8corresponding with the boiler tubes l is connected with an inner boilerhead or partition wall 5 by short integral horizontal tubular extensions6 but the latter may be arranged at an inclination or in any otherposition to suit the disposition of the boiler tubes. The inside boilerhead 5, the connecting tube 6 and the outside boiler head 1 arepreferably cast in a single piece, the tubular portion being ofsuflicient size to connect the two boiler heads rigidly together.

The inner boiler head 5,'which is designed v to extend upward only asfar as the boiler tubes, terminates at its side edges short of the wallsof the boiler and is arranged in spaced relation with the same to permitthe water to pass around the side edges of the inner head 5 to the spacebetween the inner and outer headsand the said inner head 5 is alsoprovided with a plurality of openings 7 for the passage of water to theintervening space between the boiler heads. Any number of these waterpassages or openings 7 may be employed and in practice the inside headwill be provided with as many as may be conveniently formed thereinwithout weakening the structure. The inside boiler head is also providedwith openings 8 corresponding with the bores or openings of the tubularextensions or connecting portions 6 and receiving the adjacent ends 9 ofthe boiler tubes l. The ends 9 of the boiler tubes 4 are expanded bysuitable tools into grooves 10 of annular shape preferably formed in theinner head but the grooves may be provided at any other desired pointand they efi'ectively prevent the boiler tubes from pulling out of theopenings of the inside head. The inside boiler tube supporting head 5holds the ends of the boiler tubes in spaced relation with the outsidehead, and as the water is permitted to circulate entirely around theends of the boiler tubes the latter are effectively prevented fromburning out. The short tubes 6 or tubular connecting portions and theboiler tubes 4 form passages for the products of combustion in the usualmanner and the improved boiler head is designed for use in connectionwith various types of boilers of this class.

What is claimed is 1. A device of the class described includ ing anoutside boiler head designed to be united at its periphery with thewalls of the boiler and provided with openings, an inside boiler head orwall spaced from the outside boiler head and also from the walls of theboiler and located within the same, said inside boiler head or wallbeing provided with openings for the reception of boiler tubes and shorttubular portions connecting the inside and outside boiler headscoinciding with the said openings.

2. The combination with the walls of a boiler of an outside headconnected at its periphery to the said walls and provided with openings,an inside head or wall located within the boiler and spaced from thewalls thereof and also from the outside head, said inside head or wallbeing provided with openings for the reception of the ends of boilertubes, and short tubular portions formed integral with the inside andoutside heads and coinciding with the said openings.

3. The combination with the walls of a boiler, of an outside boiler headunited at its periphery with the said walls and provided with openings,an inside boiler head provided with openings for the reception of theends of boiler tubes and having interiorly arranged grooves into whichthe tubes are expanded, and tubular extensions or members connecting theinside and outside heads and coinciding with the said openings.

4:. The combination with a boiler, of an outside head united at itsperiphery with the walls of the boiler and provided with openings, aninside head spaced from the walls of the boiler and also from theoutside head and provided with boiler tube openings and having otheropenings for the passage of the water, and tubular portions connectingthe inside and outside heads and coinciding with the openings of theoutside head and with the boiler tube openings of the inside head.

In testimony whereof I aflix my signature in presence of two witnesses.

NOAH B. SHEPARD. Witnesses:

B0B HOLT, WAYNE HOLT.

copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents, Washington, D. C.

